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SQL Interview Success: Unlocking the Top 5 Frequently Asked Queries

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 Here are the five top commonly asked SQL queries in the interviews. These you can expect in Data Analyst, or, Data Engineer interviews. Top SQL Queries for Interviews 01. Joins The commonly asked question pertains to providing two tables, determining the number of rows that will return on various join types, and the resultant. Table1 -------- id ---- 1 1 2 3 Table2 -------- id ---- 1 3 1 NULL Output ------- Inner join --------------- 5 rows will return The result will be: =============== 1  1 1   1 1   1 1    1 3    3 02. Substring and Concat Here, we need to write an SQL query to make the upper case of the first letter and the small case of the remaining letter. Table1 ------ ename ===== raJu venKat kRIshna Solution: ========== SELECT CONCAT(UPPER(SUBSTRING(name, 1, 1)), LOWER(SUBSTRING(name, 2))) AS capitalized_name FROM Table1; 03. Case statement SQL Query ========= SELECT Code1, Code2,      CASE         WHEN Code1 = 'A' AND Code2 = 'AA' THEN "A" | "A

30 High Paying Tech Jobs,$110,000 Plus Salary

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There is a growing demand for software developers across the globe. These 30 highly paying IT jobs really worth. PaaS or "Platform as a Service" is a type of cloud computing technology. It hosts everything that a developer needs to write an app. These apps once written, would live on PaaS cloud. Paas++jobs Cassandra is a free and open source NoSQL database. It's a kind of database that can handle and store data of different types and sizes of data and it's increasingly the go-to database for mobile and cloud applications. Several IT companies including Apple and Netflix use Cassandra. Cassandra+jobs MapReduce has been called "the heart of Hadoop." MapReduce is the method that allows Hadoop to store all kinds of data across many low-cost computer servers. To get meaningful data of Hadoop, a programmer writes software programs (often in the popular language, Java) for MapReduce. Mapreduce+jobs 30 High Paying IT Jobs Cloudera is a company that ma